:root {
  --bg: #f7fbfa;
  --surface: #ffffff;
  --surface-soft: #eef8f5;
  --ink: #151923;
  --muted: #596274;
  --line: #d8e3e0;
  --yes: #079b8e;
  --yes-dark: #08796f;
  --no: #ef5b4d;
  --maybe: #d59100;
  --focus: #0f6fba;
  --shadow: 0 18px 50px rgba(23, 36, 49, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    linear-gradient(135deg, rgba(7, 155, 142, 0.08), transparent 36rem),
    linear-gradient(315deg, rgba(239, 91, 77, 0.08), transparent 34rem),
    var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

button,
input {
  font: inherit;
}

button {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  min-height: 44px;
  padding: 0.75rem 1rem;
}

button:hover {
  border-color: #aac6c0;
}

button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(15, 111, 186, 0.22);
  outline-offset: 2px;
}

.page-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 2rem clamp(1rem, 3vw, 2rem) 4rem;
}

.hero {
  display: grid;
  gap: 1.5rem;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  color: var(--yes-dark);
  font-weight: 700;
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 4.6rem);
  line-height: 0.96;
  margin-bottom: 0.8rem;
}

h2 {
  font-size: 1.2rem;
  line-height: 1.2;
}

.lede {
  color: #33415a;
  font-size: 1.1rem;
  margin-bottom: 0;
}

.tool-panel,
.content-grid article,
.detail-section,
.faq-section {
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.tool-panel {
  padding: clamp(1rem, 2vw, 1.5rem);
}

.control-strip {
  display: grid;
  grid-template-columns: minmax(16rem, 1.2fr) minmax(18rem, 1.1fr) minmax(14rem, 0.8fr);
  gap: 1rem;
  align-items: end;
}

.field-group label,
.mode-group legend {
  display: block;
  font-weight: 750;
  margin-bottom: 0.5rem;
}

.field-group label span {
  color: var(--muted);
  font-weight: 500;
}

.field-group input {
  border: 1px solid #cbd8d5;
  border-radius: 8px;
  color: var(--ink);
  min-height: 50px;
  padding: 0 1rem;
  width: min(32rem, 100vw - 4rem);
  max-width: none;
}

.helper,
.status-note,
.question-echo {
  color: var(--muted);
}

.helper {
  margin: 0.5rem 0 0;
  font-size: 0.92rem;
}

.mode-group {
  border: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 0;
  padding: 0;
}

.mode-group legend {
  grid-column: 1 / -1;
}

.mode-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 0.15rem;
  padding: 0.85rem 0.9rem;
}

.mode-card.is-active {
  background: var(--surface-soft);
  border-color: var(--yes);
}

.mode-card input {
  position: absolute;
  opacity: 0;
}

.mode-card span {
  font-weight: 750;
}

.mode-card small {
  color: var(--muted);
}

.summary-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.summary-metrics div {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.8rem;
}

.summary-metrics span,
.summary-metrics strong {
  display: block;
}

.summary-metrics span {
  color: var(--muted);
  font-size: 0.85rem;
}

.summary-metrics strong {
  font-size: 1.8rem;
}

.workspace-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(18rem, 0.9fr);
  gap: 1rem;
  margin-top: 1rem;
}

.result-stage,
.history-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.result-stage {
  min-height: 390px;
  overflow: hidden;
  padding: clamp(1.25rem, 4vw, 2rem);
  position: relative;
  text-align: center;
}

.stage-label {
  color: #33415a;
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.answer-orbit {
  inset: 0;
  pointer-events: none;
  position: absolute;
}

.answer-orbit span {
  background: rgba(7, 155, 142, 0.24);
  border-radius: 999px;
  height: 0.55rem;
  position: absolute;
  width: 0.55rem;
}

.answer-orbit span:nth-child(1) {
  left: 18%;
  top: 34%;
}

.answer-orbit span:nth-child(2) {
  right: 18%;
  top: 28%;
}

.answer-orbit span:nth-child(3) {
  bottom: 28%;
  right: 24%;
}

.answer-output {
  color: var(--yes);
  display: block;
  font-size: clamp(4rem, 12vw, 9rem);
  font-weight: 850;
  letter-spacing: 0;
  line-height: 0.95;
  margin: 2rem auto 1rem;
  min-height: 8rem;
  position: relative;
}

.answer-output.is-no {
  color: var(--no);
}

.answer-output.is-maybe {
  color: var(--maybe);
}

.answer-output.is-ready {
  color: #75808f;
  font-size: clamp(3rem, 8vw, 5rem);
}

.answer-output.is-spinning {
  animation: pulse 0.55s ease-in-out infinite alternate;
  color: #0f6fba;
}

@keyframes pulse {
  from {
    opacity: 0.55;
    transform: scale(0.98);
  }
  to {
    opacity: 1;
    transform: scale(1.02);
  }
}

.question-echo {
  margin: 0 auto 1.5rem;
  max-width: 42rem;
  min-height: 1.5rem;
}

.action-row {
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  padding-top: 1rem;
}

.primary-action {
  background: var(--yes);
  border-color: var(--yes);
  color: #fff;
  font-weight: 800;
}

.primary-action:hover {
  background: var(--yes-dark);
  border-color: var(--yes-dark);
}

.status-note {
  margin: 1rem 0 0;
}

.history-panel {
  padding: 1rem;
}

.panel-heading {
  align-items: center;
  display: flex;
  gap: 0.75rem;
  justify-content: space-between;
}

.panel-heading h2 {
  margin-bottom: 0;
}

.count-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
  margin: 1rem 0;
}

.count-grid span {
  background: #f5faf9;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  padding: 0.65rem 0.5rem;
  text-align: center;
}

.count-grid b {
  color: var(--ink);
  display: block;
  font-size: 1.4rem;
}

.history-list {
  display: grid;
  gap: 0.55rem;
  list-style: none;
  margin: 0;
  max-height: 18rem;
  overflow: auto;
  padding: 0;
}

.history-list li {
  border-bottom: 1px solid #e8efed;
  display: grid;
  gap: 0.3rem;
  padding: 0.55rem 0;
}

.history-list li:last-child {
  border-bottom: 0;
}

.history-answer {
  border-radius: 999px;
  color: #fff;
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.15rem 0.45rem;
  width: fit-content;
}

.history-answer.yes {
  background: var(--yes);
}

.history-answer.no {
  background: var(--no);
}

.history-answer.maybe {
  background: var(--maybe);
}

.history-question,
.history-time,
.empty-history {
  color: var(--muted);
}

.history-question {
  color: var(--ink);
}

.history-time {
  font-size: 0.82rem;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.content-grid article,
.detail-section,
.faq-section {
  padding: clamp(1rem, 2vw, 1.4rem);
}

.steps-list,
.example-list {
  padding-left: 1.25rem;
}

.steps-list li,
.example-list li {
  margin-bottom: 0.5rem;
}

.detail-section {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1rem;
}

.faq-section {
  margin-top: 1rem;
}

.faq-list {
  display: grid;
  gap: 0.75rem;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.faq-item button {
  border: 0;
  display: block;
  font-weight: 750;
  inline-size: -webkit-fill-available;
  text-align: left;
}

.faq-item button::after {
  content: "+";
  float: right;
}

.faq-item button[aria-expanded="true"]::after {
  content: "-";
}

.faq-item p {
  border-top: 1px solid var(--line);
  color: var(--muted);
  max-height: 12rem;
  margin: 0;
  overflow: clip;
  padding: 1rem;
  transition: max-height 180ms ease, padding 180ms ease, border-color 180ms ease;
}

.faq-item button[aria-expanded="false"] + p {
  border-color: transparent;
  max-height: 0;
  padding-bottom: 0;
  padding-top: 0;
}

@media (max-width: 880px) {
  .control-strip,
  .workspace-grid,
  .content-grid,
  .detail-section {
    grid-template-columns: 1fr;
  }

  .summary-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .page-shell {
    padding-inline: 0.85rem;
  }

  .mode-group,
  .summary-metrics,
  .count-grid {
    grid-template-columns: 1fr;
  }

  .tool-panel {
    padding: 0.85rem;
  }

  .result-stage {
    min-height: 330px;
  }

  .answer-output {
    min-height: 5.2rem;
  }

  .action-row button {
    width: min(24rem, 90vw);
  }
}